Leg, hole:
|
176-735B- |
118-735B-
|
176-735B- | 118-735B- |
176-735B-
|
|||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: Interval (cm):
|
145R-5
49-53 |
190R-6
42-48 |
149R-4
82-87 |
149R-4
82-87 |
54R-4
0-9 |
162R-6
29-36 |
119R-5
62-68 |
157R-7
1-5 |
118R-1
135-140 |
41R-4
68-70 |
20R-2
13-21 |
118R-4
50-55 |
Rock type: | Gabbro | Oxide gabbro | ||||||||||
Major element oxide (wt%): | ||||||||||||
SiO2 | 36.38 | 37.31 | 37.08 | 36.96 | 36.98 | 37.69 | 37.29 | 36.43 | 36.82 | 36.35 | 35.28 | 35.42 |
TiO2 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.04 | 0.00 | 0.02 | 0.00 |
Al2O3 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 |
FeO | 32.88 | 25.89 | 27.02 | 28.39 | 26.34 | 26.83 | 27.76 | 30.24 | 31.64 | 35.08 | 35.78 | 37.32 |
NiO | 0.00 | 0.08 | 0.00 | 0.10 | 0.00 | 0.00 | 0.09 | 0.12 | 0.06 | 0.03 | 0.03 | 0.00 |
MnO | 0.63 | 0.38 | 0.51 | 0.47 | 0.59 | 0.33 | 0.30 | 0.51 | 0.46 | 0.55 | 0.53 | 0.71 |
MgO | 30.35 | 36.69 | 35.62 | 34.83 | 36.18 | 35.35 | 34.35 | 32.18 | 31.35 | 29.40 | 27.46 | 26.11 |
CaO | 0.10 | 0.07 | 0.05 | 0.02 | 0.00 | 0.11 | 0.33 | 0.00 | 0.06 | 0.06 | 0.04 | 0.00 |
Total | 100.35 | 100.42 | 100.32 | 100.77 | 100.09 | 100.32 | 100.12 | 99.48 | 100.45 | 101.47 | 99.26 | 99.56 |
Number of cations based on 4 O: | ||||||||||||
Si | 0.9956 | 0.9856 | 0.9859 | 0.9850 | 0.9834 | 0.9989 | 0.9966 | 0.9936 | 0.9991 | 0.9930 | 0.9926 | 1.0008 |
Ti | 0.0000 | 0.0000 | 0.0004 | 0.0000 | 0.0000 | 0.0002 | 0.0000 | 0.0000 | 0.0009 | 0.0000 | 0.0004 | 0.0000 |
Al | 0.0000 | 0.0000 | 0.0011 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0040 | 0.0000 |
Fe+2 | 0.7526 | 0.5719 | 0.6008 | 0.6328 | 0.5857 | 0.5946 | 0.6203 | 0.6898 | 0.7180 | 0.8014 | 0.8417 | 0.8818 |
Ni | 0.0000 | 0.0017 | 0.0000 | 0.0022 | 0.0000 | 0.0000 | 0.0018 | 0.0027 | 0.0014 | 0.0007 | 0.0007 | 0.0000 |
Mn | 0.0147 | 0.0084 | 0.0114 | 0.0107 | 0.0133 | 0.0073 | 0.0068 | 0.0118 | 0.0106 | 0.0127 | 0.0126 | 0.0169 |
Mg | 1.2384 | 1.4447 | 1.4121 | 1.3839 | 1.4343 | 1.3967 | 1.3685 | 1.3086 | 1.2681 | 1.1974 | 1.1518 | 1.0998 |
Ca | 0.0031 | 0.0020 | 0.0014 | 0.0005 | 0.0000 | 0.0032 | 0.0093 | 0.0000 | 0.0017 | 0.0018 | 0.0012 | 0.0000 |
Total | 3.0044 | 3.0144 | 3.0120 | 3.0150 | 3.0166 | 3.0009 | 3.0034 | 3.0064 | 2.9999 | 3.0070 | 3.0010 | 2.9992 |
Fo | 62.2 | 71.6 | 70.2 | 68.6 | 71.0 | 70.1 | 68.8 | 65.5 | 63.8 | 59.9 | 57.8 | 55.5 |
Fa | 37.8 | 28.4 | 29.8 | 31.4 | 29.0 | 29.9 | 31.2 | 34.5 | 36.2 | 40.1 | 42.2 | 44.5 |